Design and performance of cold mix asphalt � A review

Abstract

Although cold mix asphalt (CMA) has several advantages over hot mix asphalt (HMA) in terms of safety in manufacturing and application, fuel saving, non-emission of harmful gases and ease in laying of the paving mix in any climatic condition, it has attracted little attention and has been considered inferior to HMA in terms of the performance. Research and field application of CMA has also been largely discounted compared to the HMA. However, advancement of such sustainable/green technology like cold mix technology should be given emphasis in view of environmental requirements. Various studies on CMA have mainly focused on modification of CMA through incorporation of active fillers, chemicals, fibers and different waste materials to improve the performance of CMA comparable to HMA performance. This paper critically reviews the previous research works in terms of the design methods followed, mix parameters, laboratory and field performances of CMA towards providing a sustainable solution to the road construction. The paper also presents the benefits, limitations and factors those contribute to successful applications of CMA, along with the future scope of research to expand CMA applications. � 2021 Elsevier Ltd